Thread scheduler rewrite (#393)

* Started to rewrite the thread scheduler

* Add a single core-like scheduling mode, enabled by default

* Clear exclusive monitor on context switch

* Add SetThreadActivity, misc fixes

* Implement WaitForAddress and SignalToAddress svcs, misc fixes

* Misc fixes (on SetActivity and Arbiter), other tweaks

* Rebased

* Add missing null check

* Rename multicore key on config, fix UpdatePriorityInheritance

* Make scheduling data MLQs private

* nit: Ordering

ChocolArm64/Instruction/AInstEmitMemoryEx.cs

@@ -1,5 +1,6 @@
 using ChocolArm64.Decoder;
 using ChocolArm64.Memory;
+using ChocolArm64.State;
 using ChocolArm64.Translation;
 using System;
 using System.Reflection.Emit;
@@ -170,6 +171,8 @@ namespace ChocolArm64.Instruction
             Context.EmitLdarg(ATranslatedSub.MemoryArgIdx);
             Context.EmitLdarg(ATranslatedSub.StateArgIdx);
 
+            Context.EmitCallPropGet(typeof(AThreadState), nameof(AThreadState.Core));
+
             if (Rn != -1)
             {
                 Context.EmitLdint(Rn);